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When Will Robins Reach the End of the Trail?
Making
Predictions for the Northern Observation Posts
Overview:
Some robins migrate to North America's far north to breed. Because
few people live in the most remote regions, we have found willing
volunteers to watch for the robin's arrival there.
These
sites are our official "Northern Observation Posts" (NOPs).
While
we wait for robins to reach the far north, make some predictions:
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Laying
the Groundwork
Exploration
1. Before
making your predictions, look at annual temperatures in the NOP regions.
(Unlike hummingbird migration, robin migration is tightly connected to
weather. Robins move forward as the weather — and the availability
of food sources — improves.) The map below shows average monthly
temperatures throughout the year. Looking at it closely can help you make
more accurate predictions about the arrival of robins at the Northern
Observation Posts.
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Monthly
Global Temperatures
Click for an animated map of average
monthly air temperatures. Answer the questions you find there.
(Hint:
One theory says that robins migrate along with average temperatures
of 36 degrees F.) |
(Note:
You can look at more maps and weather data by clicking links under Digging
Deeper, below.)
2. Use
Your 2006 Prediction
Log for the NOPs to record your predictions about when reporters at
Journey North's Northern Observation Posts will (1) see the FIRST robins
and (2) hear the first robin SONG.
3.
Keep an eye on Journey North's Robin
News updates and on weather maps that feature the Northern Observation
Posts. How did your predictions turn out? You may want to revise them
as the season unfolds!
Discussion
or Journaling Questions
- How did
your predictions compare with the actual dates of first robin sightings
and songs at the NOPs? What factors might have influenced the actual
dates?
- Did you
notice any pattern in the time span between the first arrivals and first
songs? If so, how would you explain it?
Digging
Deeper: More
Map Links
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Copyright
1997-2008 Journey North. All Rights Reserved. Questions or comments?
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